1 /**
2 *
3 * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
4 *
5 * ====================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ====================================================================
18 */
19 package org.jclouds.blobstore.attr;
20
21 /**
22 * Represents the ways data can become consistent in distributed systems.
23 *
24 * @author Adrian Cole
25 *
26 */
27 public enum ConsistencyModel {
28
29 /**
30 * Eventually, all updates will propagate through the system. However, reads do not always return
31 * the latest write.
32 */
33 EVENTUAL,
34 /**
35 * Reads return the latest write.
36 */
37 STRICT
38 }